package com.yl.nettylearning.netty.day06;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.timeout.IdleStateEvent;

/**
 * @author yangl
 */
public class HeartServerHandler extends ChannelInboundHandlerAdapter {

    /**
     *
     * @param ctx 上下文
     * @param evt 事件
     * @throws Exception
     */
    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        if(evt instanceof IdleStateEvent){
            //将evt 向下转型 IdleStateEvent
            IdleStateEvent event = (IdleStateEvent)evt;
            String eventType = "";
            switch (event.state()){
                case READER_IDLE:
                    eventType = "读空闲";
                    break;
                case WRITER_IDLE:
                    eventType = "写空闲";
                    break;
                case ALL_IDLE:
                    eventType = "读写空闲";
                    break;
            }
            System.out.println(ctx.channel().remoteAddress() + "--超时事件发生--" + eventType);
            System.out.println("服务器做相应处理。。。。");
            //如果这里关闭通道，只会发送一次心跳包
        }
    }
}
